1) third-harmonic conversion
3次谐波转换
1.
In order to achieve stable and high conversion efficiency,the influence of fundamental pulse shape on third-harmonic generation was analyzed and different physical insights of third-harmonic conversion with flat-top pulse and Gaussian pulse were studied respectively.
为了使谐波转换系统保持高效稳定的3次谐波转换,采用数值模拟的方法,研究了基频光脉冲波形对3倍频转换效率的影响,并对高斯脉冲和平顶脉冲的不同谐波转换特点作了详细分析。
2) third harmonics generation
三次谐波转换
1.
The type Ⅰ/Ⅱ angle-detuning scheme for third harmonics generation has been taken as an example,and then the influence of low-frequency phase perturbation on the focal characterization of the tripling field has been discussed in details.
本文采用均方根梯度描述低频位相噪声,建立了合理的低频位相畸变模型,以Ⅰ/Ⅱ类角度失谐KDP晶体的高强度三次谐波转换为例,详细的研究了低频位相畸变对三倍频光聚焦特性的影响。
2.
Using type I/II angle-detuning schemes for third harmonics generation,the effect of third-order nonlinear interaction of KDP crystal on the tripling efficiency and beam quality under high power condition has been studied.
研究在高功率条件下I/II类角度失谐倍频方案中 ,KDP晶体的三阶非线性效应对三次谐波转换效率和光束质量的影响。
3.
The influence of third harmonics generation on the focal spot of the tripling field has been discussed.
以Ⅰ/Ⅱ类角度失谐KDP晶体的高强度三次谐波转换为例,详细研究了三次谐波转换过程中,基频光和三倍频光的波前相位畸变之间的定量变化关系。
3) third-harmonic generation
三次谐波转换
1.
Inverse problem of monochromatic third-harmonic generation;
窄带三次谐波转换的逆问题
2.
Based on the nonlinear coupling equations,the relation between group-velocities of 1ω,2ω and 3ω waves in the mixing process of broadband third-harmonic generation(THG)is investigated theoretically.
导出的三波群速匹配关系式对寻找合适的色散晶体和选择有效的匹配措施、实现宽带三次谐波转换具有指导意义。
4) third harmonic conversion
三次谐波转换
1.
A theoretical analysis is presented for third harmonic conversion in KDP (KH_2PO_4) for type Ⅰ/ type Ⅱ angle-detuning scheme of high-intensity laser.
采用了包括三阶非线性、离散及衍射等效应的谐波转换计算模型,详细讨论了在三阶非线性、离散和衍射等效应的情况下,相位扰动与三次谐波转换(THG)效率的关系,绘出了相应的关系曲线。
2.
Using type Ⅰ/type Ⅱ angle-detuning scheme for third harmonic generation,the effect of phase ripple on the characteristic of third harmonic conversion is considered and calculated when the input fundamental field is super-Gaussian beam.
采用Ⅰ /Ⅱ角度失谐的三倍频方案 ,以超高斯光束作为入射基频光场 ,建立了位相扰动光束三次谐波转换的理论模型 ,并作数值模拟计算。
5) second harmonic generation
二次谐波转换
1.
WT5”BZ]Taking the second harmonic generation of Gaussian beam in a KDP crystal of type Ⅰ matching for example, the effects of diffraction and walkoff on doubling conversion efficiency have been worked out.
以 类匹配 KDP晶体中高斯光束的二倍频为例 ,对衍射和离散两种因素对二次谐波转换效率的影响进行了数值模拟计算。
2.
Influence of temperature rise distribution in second harmonic generation crystal on intensity distributions of output second harmonic wave
利用分步快速傅里叶变换和四阶龙格-库塔法,对具有一定温升分布的倍频晶体的二次谐波转换过程进行了研究。
6) 3-harmonic
3次谐波
1.
Estimation of the 3-harmonic from Distortion Electromotive Forces in Auto Alternators;
汽车发电机电动势3次谐波分量的估算
补充资料：电力牵引高次谐波
电力牵引高次谐波
harmonics of electric traction
d Ionl一qlony旧gooe}x{ebo电j]牵引高次谐波(harmonies of eleetrietraction)整流式交流电力机车在整流过程中将引起交流侧电流、电压波形畸变，按傅立叶级数分析该畸变波形可分解成频率为基波频率整数倍的一系列高次谐波分量的叠加。 高次谐波电流、电压可引起下列不良影响: (1)对通信线产生杂音干扰影响; (2)引起电力系统中其他电力电容器设备的过负荷; (3)当电气化铁路负荷某次谐波电流频率与电力系统自身谐振频率相近时，可产生电流谐振，使该次谐波电流在电力系统中放大，危及电力系统安全运行; (4)使旋转电机、变压器、电力电缆的出力减少并产生过热，影响电气设备寿命; (5)造成继电保护误动或仪表读数误差; (6)使半导体开关元件换相失灵。 为限制谙波的危害，各国都规定了允许谐波含量的标准(见供电质童)。 为降低电力牵引负荷产生的谐波，在电力牵引变电所和电力机车中可装设由电容、电感组成的谐波吸收装置。交流一直流一交流电力机车利用电力电子技术，可实现低谐波分量的负荷特性，使谐波含量降低。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条